WESTMINSTER, Md. — With hundreds of military personnel on hand, the Ravens were back on the practice field Tuesday afternoon in preparation for the second preseason game against the Washington Redskins.

Players such as defensive tackle Kelly Gregg (below) signed autographs for uniformed military and their families for nearly an hour following a practice that lasted over two hours in the sweltering heat.

“It’s just a real special day,” coach John Harbaugh said. “We’re real proud of what all the personnel in the military all across the country and overseas has done for us. We just can’t thank them enough for their service, for the sacrifices the families make.”

Offensive lineman David Hale was absent from practice with a “bruised” tailbone sustained after defensive tackle Haloti Ngata landed on top of him in a pass-rushing drill during Monday’s morning practice. The key reserve lineman has not yet undergone an MRI or CAT scan to determine whether the tailbone is fractured, according to Harbaugh.

Concerns exist that it might be a long-term injury, a potential damaging blow given Hale’s versatility for an offensive line already dealing with the absence of Jared Gaither for the remainder of the preseason.

“I really don’t know,” said Harbaugh when asked if Hale’s injury might be season-ending. “We haven’t gotten an MRI yet, so I wouldn’t be writing that yet.”

Center Matt Birk missed his third straight practice with tightness in his neck. The 13-year veteran has not practiced since the preseason opener last Thursday. Birk started training camp on the physically unable to perform list after undergoing an elbow procedure in the offseason.

“[Birk's] going to be a guy we’re going to be very judicious with throughout training camp and even throughout the season,” Harbaugh said. “I don’t think a lot of practice is what he needs. He’s up there [in years]. When you play on the offensive line that many years, you want to be smart with those guys and how many contact reps they take.”

Ngata returned to practice after sitting out the latter portion of Monday’s practice following the collision with Hale. The Pro Bowl tackle appeared to be favoring his left wrist but showed no signs of injury on Tuesday.

Also back at practice was offensive tackle Oniel Cousins, who walked off the field with a member of the staff toward the end of practice after a skirmish with linebacker Jameel McClain earlier in the Monday morning workout. Cousins managed to get into another scuffle Tuesday, this time with linebacker Edgar Jones despite it being a lighter shells-and-shorts workout. The third-year tackle, who continues to fill in for Gaither at right tackle, has earned a reputation for mixing it up with teammates in his brief career.

“I don’t know, they might be coming after me,” said Cousins, drawing laughter from media members. “For some reason, everybody’s always trying to fight with me, I don’t know why. We’re just out there having fun. I don’t know, it’s just a practice. It’s hot and everybody’s out there getting after it.”

Stay right here for more (time-stamped below) and visit the BuyAToyota.com Audio Vault to hear more from Harbaugh, Cousins, quarterback coach Jim Zorn, and tight end Todd Heap’s conversation from the field with Rex Snider.

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8:45 p.m. — The daily installment of the kicking competition brought similar results to what we’ve seen throughout the summer.

Billy Cundiff and Shayne Graham were each perfect on five attempts, with both men connecting from 48 and 51 yards. The Ravens will likely alternate kicks between the two as they did in the preseason opener against Carolina.

8:35 p.m — The star of Tuesday’s practice—on and off the field—was veteran tight end Todd Heap, who made three spectacular catches while looking like the tight end who made consecutive Pro Bowls in 2002 and 2003.

Heap made a leaping, one-handed catch over the middle early in practice and beat cornerback Travis Fisher on a sideline route for a long gain. The 10-year veteran finished off his finest practice of the summer with a catch in the back of the end zone over cornerback Brad Jones.

Following practice, Heap signed autographs for military personnel for nearly 45 minutes before joining Rex Snider on AM 1570 WNST. You can hear the conversation in its entirety in the BuyAToyota.com Audio Vault.

While Heap shined on Tuesday, rookie David Reed’s struggles continued as the receiver dropped two passes, one of them leading to a Cary Williams’ interception on a pass thrown by Troy Smith.

After an impressive start in Westminster, Reed has struggled to catch the ball consistently, leaving his status in doubt with Demetrius Williams performing well in his efforts to grab the fifth receiver spot on the roster. Expected to be a contender to return kicks, Reed has not received many opportunities during special teams practices.

8:15 p.m. — Tuesday’s practice provided more confirmation for a possible shift in the team’s depth chart at inside linebacker.

Tavares Gooden—practicing without the red non-contact jersey—lined up next to Ray Lewis in the starting defense, another indication that Jameel McClain has lost the stronghold he enjoyed through the first three weeks of training camp. Dannell Ellerbe took reps with the starting defense on Monday as McClain worked at outside linebacker with the second unit.

Much of the defensive work, however, came in nickel and dime packages, and Gooden is considered the strongest of the three in pass coverage.

Needless to say, it will be interesting seeing who lines up with the starting unit in the team’s second preseason game against the Redskins on Saturday night.

8:05 p.m. — John Harbaugh responded to cornerback Lardarius Webb’s comments from Monday that expressed he did not want to play in the preseason and wants to be cautious in returning from an ACL injury sustained late last season. Webb’s rehab is ahead of schedule and could be activated from the PUP list in the near future.

“I think we are going to be cautious with [Webb],” Harbaugh said. “If he can play in the preseason and we feel very comfortable there’s not going to be a setback, we’ll do it. If we think there’s any possibility of a setback—reasonable possibility—we’ll probably just save him [for the regular season].”

Webb has worked out regularly on the side field during training camp, working on conditioning and agility to strengthen his surgically-repaired right knee.

Running back Matt Lawrence (knee) and linebacker Brendon Ayanbadejo (quadriceps) remain on the PUP list but were running on the side during Tuesday’s practice. Neither player has been very active during practices in Westminster, and Ayanbadejo was just recently cleared to begin running full-speed.